Reviews The Fifth Postulate: How Unraveling a Two-Thousand-Year-Old Mystery Unraveled the Universe by Jason Socrates Bardi By Science News April 23, 2009 at 4:05 pm - More than 2 years ago Share this:Share Share via email (Opens in new window) Email Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Print (Opens in new window) Print The story of the discovery of non-Euclidean geometry.Wiley, 2009, 253 p., $27.95. THE FIFTH POSTULATE: HOW UNRAVELING A TWO-THOUSAND-YEAR-OLD MYSTERY UNRAVELED THE UNIVERSE BY JASON SOCRATES BARDI